The biggest issue is the amount of ram in the free micro (t1.micro) instance is about 613MB. The free instance has some limitations, but will work fine. I signed up for the free hosting for a year from Amazon. It was an experiment for use with a larger group of Cub Scouts in my Bear den. I recently setup a Minecraft Server on Amazon Elastic Compute Cloud (EC2) for one of my sons and his friend.
